One: Since you're responding to his comment, it seems likely that you did, in fact, read it. True, it could have been read to you, or you could perhaps have used a Braille reader, or maybe you were bitten by a radioactive spider and developed the ability to psychically know what people's HN comments say without reading them, but statistically speaking it's probably safe to assume none of those are true.

Two: Assuming you did downmod his comment without reading it, you're exhibiting arbitrary behavior in a community of mostly reasonable and logical people. Perhaps this isn't the best place for you.